﻿//====================================================================================================================
//Copyright (c) 2011 IdeaBlade
//====================================================================================================================
//Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated 
//documentation files (the "Software"), to deal in the Software without restriction, including without limitation 
//the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, 
//and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
//====================================================================================================================
//The above copyright notice and this permission notice shall be included in all copies or substantial portions of 
//the Software.
//====================================================================================================================
//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE 
//WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS 
//OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
//OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 
//====================================================================================================================

using System.ComponentModel.Composition;
using System.Linq;
using Caliburn.Micro;
using HelloWorld.Events;
using IdeaBlade.Application.Framework.Core.Persistence;
using IdeaBlade.Application.Framework.Core.ViewModel;
using IdeaBlade.EntityModel;

namespace HelloWorld.ViewModel
{
    [Export]
    public class OrderDetailHarnessViewModel : Screen, IDiscoverableViewModel
    {
        private readonly IEntityManagerProvider<NorthwindIBEntities> _entityManagerProvider;
        private readonly IEventAggregator _eventAggregator;

        [ImportingConstructor]
        public OrderDetailHarnessViewModel(IEntityManagerProvider<NorthwindIBEntities> entityManagerProvider,
                                           IEventAggregator eventAggregator)
        {
            _entityManagerProvider = entityManagerProvider;
            _eventAggregator = eventAggregator;
        }

        protected override void OnActivate()
        {
            base.OnActivate();

            ShowDialog();
        }

        public void ShowDialog()
        {
            EntityQueryOperation<Order> op = _entityManagerProvider.Manager.Orders.ExecuteAsync();
            op.Completed += (s, args) =>
                                {
                                    if (args.CompletedSuccessfully)
                                        _eventAggregator.Publish(new EditOrderMessage(args.Results.First()));

                                    if (args.HasError)
                                        throw args.Error;
                                };
        }
    }
}